372 



COSMOS. 



Percy, Dr., on minerala artificially pro- 

 duced. See note by Translator, 268. 



Permitin system of Murchison, 277. 



Perouse, La, expedition of, 186. 



Persia, great comet seen in (1668), 139, 

 140. 



Pertz on the large aerolite that fell in the 

 bed of the Rivei- Nami, 116. 



Peters, Dr., velocity of stones projected 

 from JEtna, 122. 



Peucati, Count Mazari, partial infection 

 of calcareous beds by the contact of 

 syenitic granite in the Tyrol, 262. 



Phillips on the temperature of a coal- 

 mine at increasing depths, 174. 



Philolaiis, his astronomical studies, 65; 

 his fragmentary writings, 68-71. 



Philosophy of nature, first germ, 37. 



Phosphorescence of the sea in the torrid 

 zones, 202. 



Physics, their limits, 50 ; influence of phys- 

 ical science on the wealth and prosper- 

 ity of nations, 53 ; province of physical 

 science, 59 ; distinction between the 

 physical history and physical descrip- 

 tion of the world, 71, 72 ; physical sci- 

 ence, characteristics of its modern prog- 

 ress, 81. 



Pindar, 227. 



Plana, geodesic experiments in Lombar- 

 dy, 168. 



Planets, 89-99; present number discov- 

 ered, 90. (See note by Translator on 

 the most recent discoveries, 90, 91) ; Sir 

 Isaac Newton on their composition, 132 ; 

 limited physical knowledge of, 156, 157 ; 

 Ceres, 64-92; Earth, 88-99; Juno, 64, 

 92-97, 106; Jupiter, 64, 87, 92-98. 202; 

 Mars, 87, 91-94, 132 ; Mercury, 87, 92- 

 94 ; Pallas, 64, 92 ; Saturn, 87, 92-94 ; 

 Venus, 91-94, 202; Uranus, 90-94 ; plan- 

 ets which have the -largest number of 

 moons, 95, 96. 



Plants, geographical distribution of, 346- 

 350. 



Plato on the heavenly bodies, &c., 69 ; in- 

 terpretation of nature, 163; his geog- 

 nostic views on hot springs, and" vol- 

 canic igneous streams, 237, 238. 



Pliny the elder, his Natural History, 73 ; 

 on comets, 104 ; aerolites, 122, 123, 130; 

 magnetism, 180; attraction of amber, 

 188 ; on earthquakes, 205, 207 ; on the 

 flame of inflammable gas, in the district 

 of Phasehs, 223 ; rarity of jasper, 261 ; 

 on the configuration of Africa, 292. 



Pliny the younger, his description of the 

 great eruption of Mount Vesuvius, and 

 the phenomenon of volcanic ashes, 235. 



Plutarch, truth of his conjecture that fall- 

 ing stars are celestial bodies, 133, 134. 



Poisson on the planet Jupiter, 64 ; conjec- 

 ture on the spontaneous ignition of me- 

 teoric stones, 118; zodiacal light, 141-; 

 theory on the earth's temperature, 172, 

 173, 174, 176. 177. 



Polarization, chromatic, results of its dis- 

 covery, 52 ; expei iments on the Ught of 

 comets, 105, 106. 



Polybius. 291. 



Posidoaius on the Ligyan field of stouea, 

 115, 116. 



Pouillet on the actual source of atmos- 

 pheric electricity, 335. 



Prejudices against science, how originat- 

 ed, 38 ; against the study of the exact 

 sciences, why fallacious, 40, 52. 



Prichard, his physical history of Man- 

 kind, 352. 



Pseudo-Plato, 54. 



Psychrometer, 332, 338. 



Pythagoras, first employed the word Cos 

 mos in its modern sense, 69. 



Pythagoreans, their study of the heavenly 

 bodies, 65 ; doctrine on comets, 103. 



Quarterly Review, article on Terrestrial 



Magnetism, 192. 

 Quetelet on aerolites, 114 ; their periodic 



return in August, 125. 



Races, human, their geographical distri 

 bution, and unity, 351-359. 



Rain drops, temperature of, 220 ; mean an 

 nual quantity in the two hemispheres, 

 333, 334. 



Reich, mean density of the earth, as as 

 certained by the torsion balance, 170 ; 

 temperature of the mines in Saxony, 

 174. 



Reisch, Gregory, his "Margarita Philo- 

 sophica," 58. 



R6rausat, Abel, Mongolian tradition on the 

 fall of an aerolite, 116 ; active volcanoes 

 in Central Asia, at great distances from 

 the sea, 245. 



Richardson, magnetic phenomena attend 

 ing the Aurora, 197; whether accom- 

 panied by sound, 200 ; in^jience on the 

 magnetic needle of the Aurora, 201. 



Riobamba, earthquake at, 204, 206, 208, 

 213, 214. 



Ritter, Carl, his " Geography in relation 

 to Nature and the History of Man," 48, 

 67. 



Robert, Eugene, on the ancient sea-line on 

 the coast of Spitzbergen, 296. 



Robertson on the permanency of the com- 

 pass in Jamaica, 181. 



Rocks, their natui-e and configuration, 

 228 ; geognostical classification into four 

 groups, 248-251 ; i. rocks of eruption, 

 248, 251-253 ; ii. sedimentary rocks, 248^ 

 254, 255 ; iii. transformed, or meta- 

 morphic rocks, 248, 249, 255, 256-269 ; 

 iv. conglomerates, or rocks of detritus, 

 269, 270 ; their changes from the action 

 of heat, 258, 259 ; phenomena of con- 

 tact, 258-267 ; effects of pressure and 

 the rapidity of cooling, 258, 267. 



Rose, Gustav, on the chemical elements, 

 (fee, of various aerolites, 131 ; on the 

 structural relations of volcanic rocks, 

 234 ; on crystals of feldspar and albite 

 found in granite, 251 ; relations of posi- 

 tion in which granite occurs, 252-269 , 

 chemical process in the formation of 

 various minerals, 265-269. 



Ross, Sir James, his soundings with 27,600 

 feet of line, 160; magnetic observations 



